package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @description:
 * @author: yx
 * @createTime: 2024/01/08 21:18
 * @Department: 开发与技术支持部
 * @LastEditors: yx
 * @LastEditTime: 2024/01/08 21:18
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setMealDishMapper;

    /**
     * 新增菜品和对应口味
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        // 菜品表添加一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        // 获取新增之后的主键值
        Long dishId = dish.getId();
        // 口味表添加n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            // 给主键赋值
            flavors.forEach(f -> {
                f.setDishId(dishId);
            });
            // 口味表添加n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除菜品信息
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 判断是否起售中
        ids.forEach(id -> {
            // 根据id查询菜品信息
            Dish dish = dishMapper.getById(id);

            if (dish.getStatus() == StatusConstant.ENABLE) {
                // 起售状态 不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
        // 判断是否关联套餐
        List<Long> setMealIds = setMealDishMapper.getSetMealIdsByDishIds(ids);
        if (setMealIds != null && setMealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品信息
        dishMapper.deleteByDishIds(ids);
        // 删除口味信息
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品和口味信息
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        // 查询菜品表
        Dish dish = dishMapper.getById(id);
        // 查询口味表
        List<DishFlavor> dishFlavors = dishFlavorMapper.getById(id);
        // 封装数据
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {

        // 修改基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        // 删除原有口味信息
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        // 插入新口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            // 给主键赋值
            flavors.forEach(f -> {
                f.setDishId(dishDTO.getId());
            });
            // 口味表添加n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getById(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
